Video S1 Suspension feeding Ophiuroids on the slope at 670 m off the North shore of Moloka’i. Video S2 Woody debris at 572 m in a submarine canyon off the North shore of Moloka’i. Video S3 Kukui nuts (Aleurites moluccana) observed at 478 m in a submarine canyon off the North shore of Moloka’i. Video S4 Loose detritus and the caridean Heterocarpus encifer at 350 m in a submarine canyon off Oahu’s East shore. Video S5 Detrital aggregations observed in a submarine canyon off Oahu’s East shore. Similar detrital aggregates were seen moving down the canyon or wedged in rocks from 300 to 1500 m. Video S6 Myctophid school observed at 432 m in a submarine canyon off the North shore of Moloka’i. Similar aggregations were observed deeper in the same canyon and within canyon systems in the Northwest Hawaiian Islands. Video S7 An isolated rocky outcrop in a broad sediment plain at 350 m on the slope of Nihoa Island.

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